{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125385477",
    "entityType": "Track",
    "nonce": "0xdf6ded3e4a45bdaf127ba8f85d12207bdc7281f40ade2635ecf16cef025741a2",
    "signature": "0x05a23f727506d3becc2adacd3a59ca925995ba948f23a6e90728e813e1b784662fa373792dc1b19ae248a211dd49c3b6aeb228fed1a97b515585cd4600fd62001b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}